Double-spring proportional valve
By adopting a double spring structure in the proportional valve, the prepressure amount of the spring is reduced, and the assembly difficulty problem caused by excessive spring prepressure amount in the prior art is solved, and the effect of simplifying the assembly process and meeting design needs is achieved.
Patent Information
- Application Number
- CN202421674426.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-15
AI Technical Summary
When existing proportional valves meet the demand for rapid response, they need to increase the prepressure amount of springs greatly, resulting in increased assembly difficulty.
A double spring structure is adopted, wherein the first spring is located between the rear yoke and the armature, and the second spring is located in the valve plug rod. By the arrangement of the springs at both ends, the prepressure amount of the spring between the rear yoke and the armature is reduced.
It effectively reduces the prepressure amount of the spring, simplifies the assembly process, and meets the design needs of proportional valves.
Smart Images
Figure CN222811275U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of proportional valves, and in particular relates to a double-spring proportional valve. Background Art
[0002] In the automotive industry, proportional valves are used to control the oil circuit and switch the oil circuit. They have the characteristics of rapid response and precise control. In addition to the conventional coil assembly, armature, valve sleeve, valve plug and other designs, the existing proportional valve is also equipped with a spring for resetting the valve plug. In order to meet the design requirements, when the valve sleeve is designed to a certain length, the valve plug has a long travel. In order to better reset the valve plug, the preload of the spring needs to be greatly increased to meet the needs of rapid response of the proportional valve. The increase in the preload of the spring will inevitably increase the difficulty of assembling the proportional valve. Utility Model Content
[0003] In order to solve the above technical problems, the technical solution adopted by the utility model is: a double-spring proportional valve, including an outer shell and a valve sleeve, the valve sleeve is fixedly connected to the outer shell, a rear yoke, a front yoke, an armature and a coil assembly are installed inside the outer shell, the rear yoke generates magnetism after the coil assembly is energized, a first spring is arranged between the rear yoke and the armature, the armature is fixedly connected to a valve plug rod, an active cavity is arranged inside the valve sleeve, the active cavity includes a T cavity section, an A cavity section, a P cavity section and a spring installation section arranged in sequence, a T port, an A port and a P port are arranged on the valve sleeve, the T port is connected to the T cavity section, the A port is connected to the A cavity section, the P port is connected to the P cavity section, a second spring is arranged in the spring installation section, one end of the valve plug rod extends into the active cavity and is fixedly connected to the valve plug, an intermediate piston part is arranged on the valve plug rod, and the intermediate piston part and the valve sleeve form a piston structure.
[0004] As a preferred embodiment of the above technical solution, a first spring mounting groove is provided on the armature, the first spring is located in the first spring mounting groove, and a second spring mounting groove is provided on the valve plug, one end of the second spring is located in the second spring mounting groove.
[0005] As a preferred embodiment of the above technical solution, one end of the valve sleeve is provided with a mounting hole connected to the spring mounting section, a spring seat is threadedly connected in the mounting hole, and the second spring is clamped between the second spring mounting groove and the spring seat.
[0006] As a preferred embodiment of the above technical solution, a magnetic isolation sleeve is provided in the outer shell, one end of the rear yoke iron extends into the magnetic isolation sleeve and a first sealing ring is provided between the magnetic isolation sleeve, the armature moves in the magnetic isolation sleeve, a second sealing ring is provided on the magnetic isolation sleeve, the second sealing ring is located between the front yoke iron and the valve sleeve, a third sealing ring is provided on the valve sleeve, and the third sealing ring is located between the T-port and the outer shell.
[0007] As a preferred embodiment of the above technical solution, filter screens are respectively installed at the A port and the P port.
[0008] As a preferred embodiment of the above technical solution, a central chamber is provided inside the valve plug stem, the first spring installation groove and the second spring installation groove are respectively connected to the central chamber, and an oil port connected to the central chamber is provided on the valve plug stem, and the oil port is connected to the T-cavity section.
[0009] The beneficial effects of the utility model are as follows: the double spring proportional valve of the utility model effectively reduces the preload of the spring between the rear yoke iron and the armature iron by setting the springs at both ends, thus meeting the design requirements of the proportional valve. The double spring proportional valve has an ingenious structure and a simple assembly process. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0011] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0012] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0013] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0014] like Figure 1As shown, the double-spring proportional valve comprises a shell 1 and a valve sleeve 2, the valve sleeve 2 is fixedly connected to the shell 1, a rear yoke 3, a front yoke 4, an armature 5 and a coil assembly 6 are installed inside the shell 1, the rear yoke 3 generates magnetism when the coil assembly 6 is energized, a first spring 7 is arranged between the rear yoke 3 and the armature 5, a valve plug rod 8 is fixedly connected to the armature 5, an active cavity is arranged inside the valve sleeve 2, the active cavity comprises a T cavity section 9, an A cavity section 10, a P cavity section 11 and a spring installation section 12 which are arranged in sequence, a T port 13, an A port 14 and a P port 15 are arranged on the valve sleeve 2, the T port 13 is connected to the T cavity section 9, the A port 14 is connected to the A cavity section 10, the P port 15 is connected to the P cavity section 11, a second spring 16 is arranged in the spring installation section 12, one end of the valve plug rod 8 extends into the active cavity and is fixedly connected to a valve plug 17, an intermediate piston portion 18 is arranged on the valve plug rod 8, and the intermediate piston portion 18 and the valve sleeve 2 form a piston structure. When the coil assembly 6 is not energized, the first spring 7 presses against the armature 5 to form a stable state. At this time, the intermediate piston part 18 is located between the A port 14 and the P port 15, the T port 13 and the A port 14 are connected, and the oil flows in from the A port 14 and flows out from the T port 13. When the coil assembly 6 is energized, the rear yoke 3 generates magnetism, attracts the armature 5, and the armature 5 drives the entire valve plug rod 8 to move, so that the intermediate piston part 18 moves between the T port 13 and the A port 14. At this time, the A port 14 and the P port 15 are connected, and the oil flows in from the A port 14 and flows out from the P port 15. When the proportional valve is assembled, the first spring 7 and the second spring 16 are both pre-stressed. Since the first spring 7 and the second spring 16 are connected in series through the valve plug rod 8, the amount of pre-stress required for the first spring 7 can be greatly reduced, meeting the design requirements of the proportional valve.
[0015] Furthermore, the armature 5 is provided with a first spring mounting groove 19, the first spring 7 is located in the first spring mounting groove 19, the valve plug 17 is provided with a second spring mounting groove 20, one end of the second spring 16 is located in the second spring mounting groove 20. The first spring mounting groove 19 and the second spring mounting groove 20 respectively limit the first spring 7 and the second spring 16, and guide the compression and extension process of the first spring 7 and the second spring 16.
[0016] Furthermore, one end of the valve sleeve 2 is provided with a mounting hole connected to the spring mounting section 12, a spring seat 21 is threadedly connected in the mounting hole, and the second spring 16 is clamped between the second spring mounting groove 20 and the spring seat 21. The position of the spring seat 21 is adjustable, so that the preload of the second spring 16 and the first spring 7 can be adjusted.
[0017] Furthermore, a magnetic isolation sleeve 22 is provided in the housing 1, one end of the rear yoke 3 extends into the magnetic isolation sleeve 22 and a first sealing ring 23 is provided between the rear yoke 3 and the magnetic isolation sleeve 22, the armature 5 moves in the magnetic isolation sleeve 22, a second sealing ring 24 is sleeved on the magnetic isolation sleeve 22, the second sealing ring 24 is located between the front yoke 4 and the valve sleeve 2, a third sealing ring 25 is sleeved on the valve sleeve 2, and the third sealing ring 25 is located between the T port 13 and the housing 1. The first sealing ring 23 and the second sealing ring 24 improve the sealing performance inside the proportional valve to prevent oil leakage.
[0018] Furthermore, a filter screen 26 is installed at the A port 14 and the P port 15. The filter screen 26 can filter particulate matter in the oil to prevent the oil path from being blocked and prevent particulate matter from entering the proportional valve and affecting the normal operation of the proportional valve.
[0019] Furthermore, a central chamber 27 is provided inside the valve plug rod 8, the first spring installation groove 19 and the second spring installation groove 20 are respectively connected to the central chamber 27, and an oil port 28 connected to the central chamber 27 is provided on the valve plug rod 8, and the oil port 28 is connected to the T-chamber section 9. In this way, there is oil before and after the armature 5, and there will be no large pressure difference between the front and rear ends of the armature 5, which will not affect the response speed of the proportional valve.
[0020] It is worth mentioning that the technical features such as the coil assembly involved in this utility model patent application should be regarded as the prior art. The specific structure, working principle and possible control method and spatial arrangement method of these technical features can be selected by conventional methods in the field and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.
[0021] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the utility model on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A double spring proportional valve, comprising a housing and a valve sleeve, wherein the valve sleeve is fixedly connected to the housing, and a rear yoke iron, a front yoke iron, an armature iron, and a coil assembly are installed inside the housing. When the coil assembly is energized, the rear yoke iron generates magnetism, and is characterized in that: A first spring is arranged between the rear yoke and the armature, the armature is fixedly connected with a valve plug rod, an active cavity is arranged inside the valve sleeve, the active cavity includes a T cavity section, an A cavity section, a P cavity section and a spring installation section which are arranged in sequence, a T port, an A port and a P port are arranged on the valve sleeve, the T port is connected to the T cavity section, the A port is connected to the A cavity section, the P port is connected to the P cavity section, a second spring is arranged in the spring installation section, one end of the valve plug rod extends into the active cavity and is fixedly connected with the valve plug, an intermediate piston part is arranged on the valve plug rod, and the intermediate piston part and the valve sleeve form a piston structure.
2. The double spring proportional valve according to claim 1, characterized in that: The armature is provided with a first spring installation groove, the first spring is located in the first spring installation groove, the valve plug is provided with a second spring installation groove, one end of the second spring is located in the second spring installation groove.
3. The double spring proportional valve according to claim 2, characterized in that: One end of the valve sleeve is provided with a mounting hole connected to the spring mounting section, a spring seat is threadedly connected in the mounting hole, and the second spring is clamped between the second spring mounting groove and the spring seat.
4. The double spring proportional valve according to claim 1, characterized in that: A magnetic isolation sleeve is provided in the outer shell, one end of the rear yoke iron extends into the magnetic isolation sleeve and a first sealing ring is provided between the magnetic isolation sleeve, the armature moves in the magnetic isolation sleeve, a second sealing ring is sleeved on the magnetic isolation sleeve, the second sealing ring is located between the front yoke iron and the valve sleeve, a third sealing ring is sleeved on the valve sleeve, and the third sealing ring is located between the T-port and the outer shell.
5. The double spring proportional valve according to claim 1, characterized in that: Filters are installed at the A port and the P port respectively.
6. The double spring proportional valve according to claim 2, characterized in that: A central chamber is provided inside the valve plug rod, the first spring installation groove and the second spring installation groove are respectively connected to the central chamber, and an oil port connected to the central chamber is provided on the valve plug rod, and the oil port is connected to the T-cavity section.